IMAP: error syncronizing Inbox

Hi,

I use Evolution to access my Zimbra Mails via IMAP. Almost everything works perfect, I can change a mail's status in Evolution, and it shows up in Zimbra's web interface and vice versa. But this only works if the mail is in a custom folder.

If I try to act on mails in my inbox, I only get: parse error: wrong character; expected ' ' but got '?'

Since this is what Zimbra's IMAP throws at me, I kindly ask for your help. I've already digged in Evolutions code, and as I can see this mail comes directly from Zimbra.

Do you have any idea what this message means? And why it only occurs with the inbox, not the other folders?

Is there a logfile or something I can have a look at to find out which was the complete command that caused this error?

I don't know if this is an error in Evolution's IMAP implementation or Zimbra's. I already filed the bug in GNOME's bugzilla (I guess it's Evo's fault since it escapes folder names, but not tags): #533478